415
Unsupported Media Type
4xx Client error
Class
RFC 9110 §15.5.16
Defined in
What does HTTP 415 mean?
The server does not support the format of the request body. Usually a wrong or missing Content-Type header — for example sending JSON without Content-Type: application/json, or uploading an image type the endpoint does not accept.
4xx Client error: The request has a problem the client can fix: wrong URL, missing credentials, bad data or too many requests.
Common causes of a 415 error
- Missing or wrong
Content-Typeheader.
How to fix 415 Unsupported Media Type
- Set the correct
Content-Typefor the body you send.
415 and SEO
Not relevant for crawling.
Example response
HTTP/1.1 415 Unsupported Media TypeRelated status codes
- 400 Bad Request — The server cannot process the request because it is malformed.
- 406 Not Acceptable — The server cannot produce a response matching the client’s Accept headers.
- 422 Unprocessable Content — The request is well-formed but contains semantic errors.
Check which status code a URL returns with the HTTP header checker.
All HTTP status codesSearch the full list of status codes from 100 to 599 with their meanings and SEO impact.
Open the full list Frequently asked questions
What does status code 415 mean?
415 Unsupported Media Type: The server does not support the format of the request body.
How do I fix a 415 error?
Set the correct
Content-Type for the body you send.Does 415 affect SEO?
Not relevant for crawling.